John Loftus of Debunking Christianity made it clear that one of the worst things he could take up in his efforts to debunk Christianity was to argue Jesus did not exist. In one of his more recent statements to this effect he wrote: "Christians will be more likely to listen to me than someone who claims Jesus probably didn’t exist at all." He follows with this: "I am a focused, passionate man, who is single mindedly intent on debunking Christianity. This issue [mythicism] will not do the job for the simple fact of what evangelicals like David Marshall think of such a claim. It’s too far removed from what they will consider a possibility. I’d like to hear of the vast numbers of Christians who abandoned their faith because they were convinced Jesus didn’t exist. I just don’t see that happening at all. Christians will not see their faith is a delusion until they first see that the Bible is unreliable and untrustworthy, and that the doctrines they believe are indefensible, which is my focus. Now it might be that Christians could come to the conclusion the Bible is unreliable upon reading arguments that Jesus never existed, but they will be much less likely to read those very arguments because that thesis is too far removed from what they can consider a possibility."

Exactly. I agree 100% with what John Loftus writes here about the value of the Christ Myth idea for debunking Christianity. LINK.